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Rifle · Proprietary

.500 Jeffery

12.7x70mm Schuler.500 Schuler12.7x70mmRB

One of the most powerful bolt-action dangerous-game cartridges of the interwar era.

Identity
Introduced
1920
Type
Rifle
Origin
Germany
Inventor
August Schüler
Manufacturer
W. J. Jeffery & Co.
Standard
Proprietary
Status
Active
Availability
Scarce
Dimensions
Bullet ⌀
0.51″
Case length
2.756″
Overall length
3.48″
Base ⌀
0.62″
Twist
1:15
Primer
Large Rifle Magnum
Case type
Rebated Rimless
Performance
Max pressure
55,000 psi
Eff. range
150 yd
Max range
1000 yd
Recoil
75–95 ft·lb

Ballistics

Representative trajectory · 100 yd zero0–800 yd
100 yd · zero0″−156″156″ drop @ 800 yd0400800Open in Ballistic Compare ↗
Velocity
2,350–2,500 fps
Energy
6,560–8,100 ft·lb
Parent case
—

Representative trajectory — modeled from a single velocity input, not a measured load.

Dimensions

.500 Jeffery cartridge dimensions diagram

Reloading cost

Estimate your cost per round and how it compares to factory. Inputs are yours — nothing is stored.

Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.

Firearms chambered in .500 Jeffery

12 models in the database chamber .500 Jeffery. Browse all →

Mauser M98 Magnum .416 Rigby 25.6-inchBlaser R8 Safari .500 JefferyBlaser Blaser R8 .500 Jeffery 25.6-inchSako Sako 85 Safari .500 Jeffery 24.4-inchBlaser Blaser R8 .375 H&H 23.6-inchBlaser R8 .375 H&H Mag 25.75-inchBlaser R8 Professional .416 RigbySako Sako 85 Safari .375 H&H 24.4-inchMauser Mauser M98 Magnum .500 Jeffery 25.6-inchBlaser R8 Safari 375 H&HHeym Heym SR21 .500 Jeffery 24-inchMauser Mauser M98 Magnum .416 Rigby 25.6-inch

Connected reference

FirearmsFirearms in .500 Jeffery↗ToolCompare ballistics↗

History

Schüler designed the round to bring .505 Gibbs-class stopping power into the 1898 Mauser action already used for the 7×57 and 8×57. Jeffery adopted and rebranded it for the British sporting market after WWI. Its rebated rim — larger case body than rim — let a big-bore cartridge work through a standard magnum bolt face, though it demands careful feeding.

FAQs

What twist rate does .500 Jeffery use?
.500 Jeffery typically uses a 1:15 twist rate.
What bullet diameter is .500 Jeffery?
.500 Jeffery uses a 0.51″ (12.954 mm) diameter bullet.
Is .500 Jeffery still in production?
.500 Jeffery is active; typical availability is scarce.
What is .500 Jeffery used for?
.500 Jeffery is primarily used for hunting.

Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. Spotted an error? Report it →